Photoflash cube



envelope 12 of the individlla1 photoaSh lanlpS 14 do sifably are coatedwth a light reHective nlatefial 44.

It Wi11 be recognized that the obiects of this invenfion have beenachieved by the pTovision of a nuInbeT of photoHash lamps which havobeen grouped into an aS Sen1blage, and in so doing an inlpToved designof the individual photoHaSh lam S has been effected to pfotect againStany tendency for envelope fupture. The fact that a plurality of lan1 Shave been packaged together fof coInInercial purposes haS aHovvedincorpofation of a com Inon resSuTe relief chan1beT fof the SafefopeTation of the individnal lampS.

Whe pTefefred ombodimentS of the i11vention havo been illuStrated anddescribed hereinbefofe, it iS to bo understood that the invention iS notlin1ited theTeto ol thefeby.

I clain1 aS Iny invention:

1. In combination With a plurality of photoffaSh lampS ioined to forInan aSSeInblage, each of Said photoaSh lanlpS conlpriSing a sealedlighttTanSn1itting organic plaStio envelope of pfedotefInined thickneSSand oncloS ing a chaTge of aShpToducing InateriaL and ignition n1eanSaSSociated vvith each of Said laIIlpS to perInit said lampS to be aShedindividnany, tbe improveInent Which compfiseS:

(a) at leaSt one Sealed preSSuTe felief chao]ber foTn1 ing a part ofsaid aSSemblage, and each of said individual laIn S having a comn1on wanWith Said presSUro feHef chambeT;

(b) a relatively SInan portion of each of Said coIn- Inon vvalIs betWeeneach of said individual lanpS and said pressnfe felief chambef having athickneSS vvhich is leSS by a pTedetefn1ined aInount than the thicknessof the ren1aining portion of each of Said Common WanS as wen aS thethickness of an othef poftionS of the individual laInp envelopes;

(c) a location fo1 controned fuptUTe pTovided by each said sn1an commonWan poftion of Teduced thick ness, and upon activation of Said ignitionnleans to aSh any one of Said laInpS, Said poTtion of feduced thicknesSin said common wall of Said laInp being aShed fnptuTing under thegenefated pressore fo fofn1 a gaS-thfottling apefture fron1 tho envolopoof the lamp being ashed into said pfossuTo Toliof chambef;

(d) the thickness of Said poftion of Teduced thickneSS in all of saidcoInn1on WallS of yet-unaShed lampS being Sufficient to vvithStandfuptuTe unde1 the Tessure encountered in Said pfessure relief chanbefdufing flashing of any of said individual lamps.

2. The con1bination as specifed in claim 1, Whefein said preSSuro TeliefchambeT iS centrally diSpoSed With feSpect to each of Said individualphotofiash lampS.

3. T'he con1bination as specified in claiIn 1, vvhefein Said photoashlampS are elongafed, and Said presSnfe Telief ohaInber iS positionedadiaoent one end of each of Said elongated photo11aShlamps.

4. The coII1bination as specified in claim 1, Whefein each of SaidlaInpS has a face poftion through Which Hght iS emitted on HaShing, andan integral renector iS aSSociated With each of Said lamps fof difeotingthe geneTated light towald said lanlp face poftfon.

5. The con1bination as speoined in claim 1, Wherein said pTesSure feliefchaInbef oocupieS the volI1ITle abont the longit11dinal aXiS of acyHndTical aSSeInblage, and and laInps aTe aTfanged about the centfalcylinder.

1efefencoS (:ifed

UNITED STATES PATENTS 2,865,186 12/1958 AndeTson et aL 43193 3,ZZO,ZZ411/196S Baird 43194 3,309,S13 3/1967 Aymaf Z401.3 3 319 08 S/1967 Toomeyet al 43193 X 3,3S0,SS1 10/1967 whitehead Z40-1.3 3 358,476 1Z/1967BuzalSki Z40L3 X U.S. CL X.R. 43 l9S

1. IN COMBINATION WITH A PLURALITY OF PHOTOFLASH LAMPS JOINED TO FORM ANASSEMBLAGE, EACH OF SAID PHOTOFLASH LAMPS COMPRISING A SEALEDLIGHT-TRANSMITTING ORGANIC PLASTIC ENVELOPE OF PREDETERMINED THICKNESSAND ENCLOSING A CHARGE OF FLASH-PRODUCING MATERIAL, AND IGNITION MEANSASSOCIATED WITH EACH OF SAID LAMPS TO PERMIT SAID LAMPS TO BE FLASHEDINDIVIDUALLY, THE IMPROVEMENT WHICH COMPRISES: (A) AT LEAST ONE SEALEDPRESSURE RELIEF CHAMBER FORMING A PART OF SAID ASSEMBLAGE, AND EACH OFSAID INDIVIDUAL LAMPS HAVING A COMMON WALL WITH SAID PRESSURE RELIEFCHAMBER; (B) A RELATIVELY SMALL PORTION OF EACH OF SAID COMMON WALLSBETWEEN EACH OF SAID INDIVIDUAL LAMPS AND SAID PRESSURE RELIEF CHAMBERHAVING A THICKNESS WHICH IS LESS BY A PREDETERMINED AMOUNT THAN THETHICKNESS OF THE REMAINING PORTION OF EACH OF SAID COMMON WALLS AS WELLAS THE THICKNESS OF ALL OTHER PORTIONS OF THE INDIVIDUAL LAMP ENVELOPES;